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Chemistry is the study of matter and the changes it undergoes. Matter is anything that has mass and occupies space. Matter is all around us; the air, water, soil, mountains, even our bodies are all examples of matter. Matter is divided into three states — solid, liquid, and gas — that are commonly found on earth. The fourth state of matter, plasma, occurs naturally in the interiors of stars. 
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Experimental and Data Analysis Workflow for Soft Matter Nanoindentation
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Cost-Utility Analysis Using EQ-5D-5L Data: Does How the Utilities Are Derived Matter?

Fan Yang1, Nancy Devlin2, Nan Luo3

  • 1Centre for Health Economics, University of York, York, UK.

Value in Health : the Journal of the International Society for Pharmacoeconomics and Outcomes Research
|January 22, 2019
PubMed
Summary

The EQ-5D-5L value set and crosswalk methods yield different cost-effectiveness results for end-stage renal disease treatments. These differences depend on patient groups and country-specific value sets, impacting health economic evaluations.

Keywords:
EQ-5D-3LEQ-5D-5Lcost-utility analysiscrosswalkvalue set

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Area of Science:

  • Health Economics
  • Outcomes Research
  • Biostatistics

Background:

  • Cost-effectiveness analysis (CEA) relies on accurate health utility measures.
  • The EQ-5D-5L instrument offers greater precision than EQ-5D-3L but requires appropriate value sets or conversion methods.
  • Understanding the impact of different utility estimation methods is crucial for reliable economic evaluations.

Purpose of the Study:

  • To compare the influence of using the EQ-5D-5L value set versus a crosswalk from EQ-5D-5L to EQ-5D-3L on CEA results.
  • To assess these effects across England and six other diverse countries.
  • To evaluate the impact on cost-effectiveness models for end-stage renal disease (ESRD) treatments.

Main Methods:

  • Individual-level utilities were derived using EQ-5D-5L value sets (5L) and crosswalk methods (c5L).
  • Utilities were applied to three Markov models evaluating hemodialysis (HD) and peritoneal dialysis (PD) for ESRD.
  • Incremental quality-adjusted life years (QALYs) were calculated, and mathematical functions between QALYs and utilities were derived.

Main Results:

  • Incremental QALYs showed similarities for non-diabetic patients but varied for diabetic and overall ESRD patient groups.
  • The EQ-5D-5L value set generally yielded more incremental QALYs for diabetic patients but fewer for all ESRD patients compared to the crosswalk.
  • Country-specific value sets (e.g., Chinese, South Korean, Dutch) significantly influenced the magnitude of differences in incremental QALYs.

Conclusions:

  • The EQ-5D-5L value set and crosswalk approaches are not interchangeable for utility estimation in economic evaluations.
  • Cost-effectiveness analysis results are sensitive to both absolute utility values and the differences in utilities between treatment options.
  • Careful consideration of the chosen utility estimation method and relevant value sets is essential for robust health economic assessments.